Hadoop 安装(单结点)

Dear 丶 2022-02-28 07:40 152阅读 0赞

### 前言 ###

`Hadoop`的部署与安装是`Hadoop`研究过程中必定不可缺少的一环. Hadoop部署方式分三种，Standalone mode、Pseudo-Distributed mode、Cluster mode，其中前两种都是在单机部署。本章主要讲述如何在`Standalone mode`与`Pseudo-Distributed mode`的部署方式.

Hadoop的基本主件主要包括:

*  HDFS (NameNode / SecondyNameNode / DataNode)
 *  YARN( ResourceManager / NodeManager)

下面我们将主要安装如下几个组件.

--------------------

### 准备工作 ###

*  前置条件 JDK
 *  下载Hadoop的包,并解压.
 *  配置Haddoop环境变量.

export HADOOP_HOME_2_7_5=/Users/Sean/Software/hadoop/hadoop-2.7.5
    export PATH=$PATH:$HADOOP_HOME_2_7_5/bin

--------------------

### Standalone mode ###

*  standalone mode（本地单独模式）  
    这种模式，仅1个节点运行1个java进程，主要用于调试。单结点模式,无需进行任何单安装操作.

# 使用测试用例 运行WordCount
    # 创建input命令
    mkdir input
    # 将文件拷贝到指定目录
    cp etc/hadoop/*.xml input
    # 运行Jar包(注意版本号) 此job是使用hadoop自带的样例，在input中统计含有dfs的字符串。
    hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.5.jar grep input output 'dfs[a-z.]+'
    cat output/*

--------------------

### Pseudo-Distributed mode(伪分布式模式) ###

在伪分布式模式中,我们需要在一台机器上安装如下内容:

*  `HDFS`中的 `NameNode`与`DateNode`
 *  `YARRN`中的 `ResourceManager`与`NodeManager`

好的,我们下面正式进入安装过程.

##### 安装HDFS #####

*  修改配置文件(`core-site.xml`与`hdfs-site.xml`)

> core-site.xml (配置文件访问地址)

<?xml version="1.0" encoding="UTF-8"?>
    <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
    
    <configuration>
    	<property>
            <name>fs.defaultFS</name>
            <value>hdfs://localhost:9000</value>
        </property>
        
         <property>
         <name>hadoop.tmp.dir</name>
         <value>/Users/Sean/Software/hadoop/hadoop-2.7.5/tmp</value>
         </property>
    </configuration>

> hdfs-site.xml (配置拷贝次数)

<?xml version="1.0" encoding="UTF-8"?>
    <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
    <configuration>
    	<property>
            <name>dfs.replication</name>
            <value>1</value>
        </property>
    </configuration>

*  配置本机免密

# ssh-keygen -t rsa
    # cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

*  格式化文件系统后, 启动系统

# 格式化文件系统
     hdfs namenode -format
    # 启动系统
     sbin/start-dfs.sh

*  启动日志小解

localhost:sbin Sean$ ./start-dfs.sh
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    19/03/25 11:09:16 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    # 启动本地namenode
    Starting namenodes on [localhost]
    localhost: starting namenode, logging to /Users/Sean/Software/hadoop/hadoop-2.7.5/logs/hadoop-Sean-namenode-localhost.out
    # 启动本地datanode
    localhost: starting datanode, logging to /Users/Sean/Software/hadoop/hadoop-2.7.5/logs/hadoop-Sean-datanode-localhost.out
    # 启动本地secondarynode
    Starting secondary namenodes [0.0.0.0]
    0.0.0.0: starting secondarynamenode, logging to /Users/Sean/Software/hadoop/hadoop-2.7.5/logs/hadoop-Sean-secondarynamenode-localhost.out
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    19/03/25 11:09:33 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

*  启动后

localhost:sbin Sean$ jps
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    3233 DataNode
    3147 NameNode
    3692 Jps
    3340 SecondaryNameNode

*  访问网页地址([http://localhost:50070][http_localhost_50070])  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95YW54bWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]
 *  插入文件验证

localhost:hadoop-2.7.5 Sean$ echo "1" >> 1.log
    localhost:hadoop-2.7.5 Sean$ hdfs dfs -put 1.log /
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    19/03/25 11:55:22 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    localhost:hadoop-2.7.5 Sean$ hdfs dfs -ls /
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    19/03/25 11:55:35 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    Found 1 items
    -rw-r--r--   1 Sean supergroup          2 2019-03-25 11:55 /1.log

*  注: 生成的日志在文件安装目录的`logs`文件夹下方.例如:`namenode`的日志为`hadoop-Sean-namenode-localhost.log`

##### 安装YARN #####

*  修改配置文件

> mapred-site.xml

<?xml version="1.0"?>
    <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
    <configuration>
    	<property>
            <name>mapreduce.framework.name</name>
            <value>yarn</value>
        </property>
    </configuration>

> yarn-site.xml

<?xml version="1.0"?>
    	<property>
            <name>yarn.nodemanager.aux-services</name>
            <value>mapreduce_shuffle</value>
        </property>
    </configuration>

*  启动脚本

localhost:sbin Sean$ jps
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    4048 Jps
    3233 DataNode
    3928 ResourceManager
    4010 NodeManager
    3147 NameNode
    3340 SecondaryNameNode

*  验证 ([http://localhost:8088][http_localhost_8088])  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95YW54bWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]
 *  使用YARN

# 创建文件夹
    hdfs dfs -mkdir -p  /user/Sean
    # 拷贝
    hdfs dfs -put etc/hadoop /user/Sean/input
    
    # 执行wordcount
    localhost:hadoop-2.7.5 Sean$ hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.5.jar wordcount /user/sean/input  output
    Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
    19/03/25 13:27:02 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
    19/03/25 13:27:03 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032
    19/03/25 13:27:04 INFO input.FileInputFormat: Total input paths to process : 30
    19/03/25 13:27:04 INFO mapreduce.JobSubmitter: number of splits:30
    19/03/25 13:27:04 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1553491599720_0001
    19/03/25 13:27:05 INFO impl.YarnClientImpl: Submitted application application_1553491599720_0001
    19/03/25 13:27:05 INFO mapreduce.Job: The url to track the job: http://localhost:8088/proxy/application_1553491599720_0001/
    19/03/25 13:27:05 INFO mapreduce.Job: Running job: job_1553491599720_0001
    19/03/25 13:27:14 INFO mapreduce.Job: Job job_1553491599720_0001 running in uber mode : false
    19/03/25 13:27:14 INFO mapreduce.Job:  map 0% reduce 0%
    19/03/25 13:27:28 INFO mapreduce.Job:  map 13% reduce 0%
    19/03/25 13:27:29 INFO mapreduce.Job:  map 20% reduce 0%
    19/03/25 13:27:40 INFO mapreduce.Job:  map 27% reduce 0%
    19/03/25 13:27:41 INFO mapreduce.Job:  map 37% reduce 0%
    19/03/25 13:27:47 INFO mapreduce.Job:  map 37% reduce 12%
    19/03/25 13:27:49 INFO mapreduce.Job:  map 40% reduce 12%
    19/03/25 13:27:50 INFO mapreduce.Job:  map 43% reduce 13%
    19/03/25 13:27:51 INFO mapreduce.Job:  map 53% reduce 13%
    19/03/25 13:27:53 INFO mapreduce.Job:  map 53% reduce 18%
    19/03/25 13:27:59 INFO mapreduce.Job:  map 60% reduce 18%
    19/03/25 13:28:02 INFO mapreduce.Job:  map 63% reduce 20%
    19/03/25 13:28:03 INFO mapreduce.Job:  map 70% reduce 20%
    19/03/25 13:28:05 INFO mapreduce.Job:  map 70% reduce 23%
    19/03/25 13:28:12 INFO mapreduce.Job:  map 77% reduce 23%
    19/03/25 13:28:14 INFO mapreduce.Job:  map 77% reduce 26%
    19/03/25 13:28:16 INFO mapreduce.Job:  map 87% reduce 26%
    19/03/25 13:28:17 INFO mapreduce.Job:  map 87% reduce 29%
    19/03/25 13:28:23 INFO mapreduce.Job:  map 93% reduce 29%
    19/03/25 13:28:25 INFO mapreduce.Job:  map 100% reduce 29%
    19/03/25 13:28:27 INFO mapreduce.Job:  map 100% reduce 100%
    19/03/25 13:28:28 INFO mapreduce.Job: Job job_1553491599720_0001 completed successfully
    19/03/25 13:28:28 INFO mapreduce.Job: Counters: 49
    	File System Counters
    		FILE: Number of bytes read=75804
    		FILE: Number of bytes written=3927609
    		FILE: Number of read operations=0
    		FILE: Number of large read operations=0
    		FILE: Number of write operations=0
    		HDFS: Number of bytes read=82078
    		HDFS: Number of bytes written=36903
    		HDFS: Number of read operations=93
    		HDFS: Number of large read operations=0
    		HDFS: Number of write operations=2
    	Job Counters
    		Launched map tasks=30
    		Launched reduce tasks=1
    		Data-local map tasks=30
    		Total time spent by all maps in occupied slots (ms)=325766
    		Total time spent by all reduces in occupied slots (ms)=55271
    		Total time spent by all map tasks (ms)=325766
    		Total time spent by all reduce tasks (ms)=55271
    		Total vcore-milliseconds taken by all map tasks=325766
    		Total vcore-milliseconds taken by all reduce tasks=55271
    		Total megabyte-milliseconds taken by all map tasks=333584384
    		Total megabyte-milliseconds taken by all reduce tasks=56597504
    	Map-Reduce Framework
    		Map input records=2109
    		Map output records=8027
    		Map output bytes=106964
    		Map output materialized bytes=75978
    		Input split bytes=3594
    		Combine input records=8027
    		Combine output records=4043
    		Reduce input groups=1585
    		Reduce shuffle bytes=75978
    		Reduce input records=4043
    		Reduce output records=1585
    		Spilled Records=8086
    		Shuffled Maps =30
    		Failed Shuffles=0
    		Merged Map outputs=30
    		GC time elapsed (ms)=2980
    		CPU time spent (ms)=0
    		Physical memory (bytes) snapshot=0
    		Virtual memory (bytes) snapshot=0
    		Total committed heap usage (bytes)=6136266752
    	Shuffle Errors
    		BAD_ID=0
    		CONNECTION=0
    		IO_ERROR=0
    		WRONG_LENGTH=0
    		WRONG_MAP=0
    		WRONG_REDUCE=0
    	File Input Format Counters
    		Bytes Read=78484
    	File Output Format Counters
    		Bytes Written=36903

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95YW54bWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2]

--------------------

### Q&A ###

> 文件没有权限?

2019-03-25 11:37:38,713 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Encountered exception loading fsimage
    org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /private/tmp/hadoop-Sean/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.
    	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:382)
    	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:233)
    	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:984)
    	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:686)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:586)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:646)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:820)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:804)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1516)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1582)
    2019-03-25 11:37:38,720 INFO org.mortbay.log: Stopped HttpServer2$SelectChannelConnectorWithSafeStartup@0.0.0.0:50070
    2019-03-25 11:37:38,826 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping NameNode metrics system...
    2019-03-25 11:37:38,827 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system stopped.
    2019-03-25 11:37:38,827 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system shutdown complete.
    2019-03-25 11:37:38,827 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode.
    org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /private/tmp/hadoop-Sean/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.
    	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:382)
    	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:233)
    	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:984)
    	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:686)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:586)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:646)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:820)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:804)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1516)
    	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1582)
    2019-03-25 11:37:38,830 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1
    2019-03-25 11:37:38,832 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG:
    /************************************************************
    SHUTDOWN_MSG: Shutting down NameNode at localhost/127.0.0.1
    ************************************************************/

解决措施(core-site更改地址 或 设置目录权限):

# 设置地址
    
      <property>
          <name>hadoop.tmp.dir</name>
          <value>/Users/Sean/Software/hadoop/hadoop-2.7.5/tmp</value>
        </property>
     # 创建文件夹
     mkdir -p /Users/Sean/Software/hadoop/hadoop-2.7.5/tmp/dfs/name

> 文件系统未初始化`java.io.IOException: NameNode is not formatted.`  
> 解决办法:`hdfs namenode -format`

> Exit code: 127  
> Stack trace: ExitCodeException exitCode=127:  
> 解决办法: 通过查看
> 
>     localhost:container_1553486900247_0023_01_000001 Sean$ cat stderr
>     /bin/bash: /bin/java: No such file or directory
>     localhost:container_1553486900247_0023_01_000001 Sean$ pwd
>     /Users/Sean/Software/hadoop/hadoop-2.7.5/logs/userlogs/application_1553486900247_0023/container_1553486900247_0023_01_000001
> 
> 方法1: 通过`ln -s /Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home/bin/java /bin/java`配置软链接  
> 方法2: 在`/etc/hadoop/hadoop-env.sh`配置`export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_102.jdk/Contents/Home`.  
> 并且注释原来的`#export JAVA_HOME=${JAVA_HOME}`.

--------------------

### Reference ###

\[1\]. [Hadoop系列之（一）：Hadoop单机部署][Hadoop_Hadoop]  
\[2\] [mac下hadoop环境的搭建以及碰到的坑点][mac_hadoop]  
\[3\] [运行 MapReduce 样例][MapReduce]  
\[4\] [(Official)Hadoop Shell命令][Official_Hadoop Shell]

[http_localhost_50070]: http://localhost:50070
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95YW54bWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]: /images/20220228/7b863f75456a4a64a8c1a3ec1851b295.png
[http_localhost_8088]: http://localhost:8088
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95YW54bWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]: /images/20220228/a20b06d865c047bbb00a30a3945a8832.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly95YW54bWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2]: /images/20220228/3787d3b1d1ac435d91b66dce28d1fa83.png
[Hadoop_Hadoop]: http://www.cnblogs.com/ee900222/p/hadoop_1.html
[mac_hadoop]: https://blog.csdn.net/chenxun_2010/article/details/78238251
[MapReduce]: https://blog.csdn.net/chengqiuming/article/details/78826143
[Official_Hadoop Shell]: http://hadoop.apache.org/docs/r1.0.4/cn/hdfs_shell.html